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Scroll compressor with back pressure chamber

a compressor and back pressure technology, applied in the direction of pump components, liquid fuel engines, rotary/oscillating piston combinations for elastic fluids, etc., can solve the problems of increasing noise and abrasion, increasing leakage, and minimal noise and vibration of the crank compressor

Active Publication Date: 2016-03-29
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text discusses a scroll compressor that can reduce wear and tear on the compressor's leakage preventing device, while also being easier to manufacture and minimizing deformation of the second scroll during the process. The technical effects of this scroll compressor include improved efficiency, durability, and reduced manufacturing costs.

Problems solved by technology

Further, as the change in torque required for compression is small and the suction and compression processes consecutively performed, the scroll compressor is known to create minimal noise and vibration.
However, in such a case, more friction between the parts may result, thereby increasing noise and abrasion.
On the other hand, if the end of the wrap portion and the surface of the plate portion are adhered to each other with less than an adequate sealing force, the friction may be reduced, but the lowering of the sealing force may result in the increase of leakage.
This may cause the first scroll to tilt, resulting in the occurrence of vibration and noise.
The structure of the upper back pressure type scroll compressor is complicated.

Method used

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Examples

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Embodiment Construction

[0022]Description will now be given in detail of embodiments, with reference to the accompanying drawings. Where possible, like reference numerals have been utilized to indicate like elements, and repetitive disclosure has been omitted.

[0023]Referring to FIG. 1, the floating plate 60 continuously moves up and down while the scroll compressor 1 is operational, in a contacted state to the surface of the back pressure chamber BP. Therefore, high lubricity and high abrasion resistance may be required. The second scroll 40 is manufactured by a casing method, and is formed of cast iron. If the lip seal repeatedly performs a sliding motion along the surface of the second scroll 40, sealing performance may be reduced due to abrasion of the lip seal as the second scroll 40 has a rough surface due to its material. However, due to the structure of the scroll compressor 1, it may be difficult to process the surface roughness of the second scroll 40 to a desired level. Further, the plate portion...

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PUM

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Abstract

An upper back pressure type scroll compressor is provided having a back pressure chamber. The scroll compressor may include a casing, a discharge cover, a main frame, a first scroll supported by the main frame, and a second scroll forming a suction chamber, an intermediate pressure chamber, and a discharge chamber together with the first scroll. The scroll compressor may also include a back pressure plate coupled to the second scroll. The back pressure plate may include a cavity with which the intermediate pressure chamber of the second scroll communicates. The scroll compressor may further include a floating plate movably coupled to the back pressure plate so as to seal an upper portion of the cavity.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to Korean Application No. 10-2013-0028775, filed in Korea on Mar. 18, 2013, the contents of which is incorporated by reference herein in its entirety.BACKGROUND[0002]1. Field[0003]A compressor, and more particularly, a scroll compressor is disclosed herein.[0004]2. Background[0005]Scroll compressors are known. However, they suffer from various disadvantages.[0006]A scroll compressor refers to a compressor that utilizes a first or orbital scroll having a spiral wrap and a second or fixed scroll having a spiral wrap, the first scroll performing an orbital motion with respect to the second scroll. While the first scroll and the second scroll are engaged with each other in operation, a capacity of a pressure chamber formed therebetween may be reduced as the first scroll performs the orbital motion. Hence, the pressure of a fluid in the pressure chamber may be increased, and the fluid discharged from a discha...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F04C18/02F04C27/00F04C28/26F04C23/00
CPCF04C18/0261F04C18/023F04C18/0215F04C23/008F04C27/005F04C28/26
Inventor JIN, HONGGYUNKIM, SUCHULPARK, KIWONYUN, JUHWAN
Owner LG ELECTRONICS INC